Preparation And Application Of One Dimensional Semiconductor Photocatalysis Materials

Photocatalysis,as a green and clean science and technology,has become an effective way to solve environmental and energy problems.The preparation of high photocatalytic photocatalyst is of great significance.Based on the one-dimensional semiconductor photocatalyst materials,the rod like CdS and tubular TiO₂ photocatalysts were synthesized by template free method and template method.The performance of the catalysts was improved.Meanwhile,the application of TiO₂ photocatalyst on motor was explored.The main contents are as follows:Preparation and properties of nuclear shell photocatalyst Cu-CdS@C₃N₄.In the NaOH solution,the photocatalyst synthesized by hydrothermal method and can adjust the size of the CdS by the concentration of the NaOH solution.Through the systematic regulation of Cu²⁺doping and the coating of C₃N₄ to CdS,a nuclear shell photocatalyst with regular morphology and good photocatalytic properties was obtained.Compared with pure CdS,the Cu-CdS@C₃N₄shows better photocatalytic performance.Cu²⁺doping increased the absorption range of visible light wavelength of CdS,while the coating of C₃N₄ reduced CdS photocorrosion.The synergistic effect between the three made the composite photocatalyst enhance visible light activity and cycling stability.Preparation and properties of TiO₂ nanotubes photocatalyst with internal and external platinum loading.Taking Te nanowire as template,two steps hydrothermal method was used.First,glucose was used as carbon source,and a carbon layer was wrapped outside the Te nanowire.Then Te@C@TiO₂ nanofibers were synthesized on the basis of product Te@C as template and titanium sulfate as titanium source.Finally,TiO₂ nanotubes were removed by calcination.The internal and external platinum loading is realized by the hydrothermal method and the photoreduction method using chloroplatin acid as the platinum source.The structure and composition of the photocatalyst were confirmed by means of SEM,TEM,HRTEM,HAADF-STEM,mapping and so on.TiO₂ nanotubes photocatalyst with internal and external platinum loading has high photocatalytic activity.Application of TiO₂ nanotubes photocatalyst on motor and its motion.The photocatalytic material is applied to the motor by using the platinum as a natural motor driving source.A new type of nanomotor,a tubular motor driven by an internal/external bubble without a surface active agent,is proposed.For the first time,we observed the nanomotors driving by external bubble promoted.We concluded the following conclusions:first,optimizing the driving source of nanomotors and reducing the size of propulsion materials to nanoscale can significantly improve the propulsion efficiency and achieve high speed in very low fuel concentration.Second,the change of the wettability of the micromotor is also one of the ways to improve the speed of the motor.